If you buy something through a link in this article, we may earn commission. Pricing and availability are subject to change. Kicking things off at 12 p.m. ET is a game between the Cleveland Cavaliers ...

Tensions always run high between sports fans of rival teams on game day. But a new study shows that the rise of legalized sports betting in the US is turning those tensions into something far darker.

When Andy Williams wrote the lyrics to "It's the Most Wonderful Time of the Year" in 1963, it's unlikely he had sports on his mind. But sports fans have been given a few extra presents the past few ...